Function check_file 

pub fn check_file<R: BufRead>(
    algo: HashAlgorithm,
    reader: R,
    opts: &CheckOptions,
    out: &mut impl Write,
    err_out: &mut impl Write,
) -> Result<(usize, usize, usize)>

Verify checksums from a check file. Each line should be “hash filename” or “hash *filename”. Returns (ok_count, fail_count, error_count).